WDS 22173-0847 LDS 782 AB : NOTES
 
 
discov_num notes refcode
LDS 782 AB: NLTT 53397/53398 Chm2004
This system counts as single in our statistics, even though it appears
to be a triple system in reality. The reason for this is that the A
component was the AstraLux target, and the BC pair at ~7.8" is outside
of the completeness cut-off at 6". Since the BC pair is visible in the
AstraLux images, we can nonetheless analyze it astrometrically. This
pair was first reported by Beuzit et al. (2004) with rho = 0.978" and
theta = 305.8deg. There are no error bars quoted, but if we assume
that the quoted precision in decimal places corresponds to measurement
precision, and adopt errors of 5 mas and 0.5deg, which should be
conservative in that circumstance, we find that common proper motion
can be confirmed at a 76 sigma confidence level. Hence, physical
companionship can be confidently inferred, even if the errors should
be substantially larger than what we have assumed. Jnn2012
 
 
REFERENCES
 
 
refcode metd author reference
Chm2004 E - Chaname, J. & Gould, A. 2004ApJ...601..289C
Chm2004 ApJ 601, 289, 2004
Chm2004 (Photometry, coordinates, and astrometry from rNLTT. Astrometry from early
Chm2004 versions of 2MASS and UCAC, with date given only as "circa 2000". Measures
Chm2004 identical to discovery observations - predominantly close pairs - were assumed
Chm2004 not new observations, so not included in WDS. Similar concerns when primary and
Chm2004 secondary magnitudes or proper motions were the same.)
Jnn2012 Cl j Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S., 2012ApJ...754...44J
Jnn2012 +E2 Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T.
Jnn2012 ApJ 754, 44, 2012 (some recalibrated measures published in Jnn2014b) 2014ApJS..214...17J
 
 
DISCOVERER
 
 
idgroup discov author
1 BEU Beuzit, J.-L., Segransan, D., Forveille, T., Udry, S., Delfosse, X., Mayor, M.,
1 BEU Perrier, C., Hainaut, M.-C., et al.
2 LDS Luyten p.m. catalog (from additional DD list)
2 VGT Vogt, N., Schmidt, T.O.B., Neuhauser, R., Bedalov, A., Roell, T., Seifahrt, A., &
2 VGT Mugrauer, M.
3 VGT Vogt, N., Mugrauer, M., Neuhauser, R., Schmidt, T.O.B., Contreras-Quijada, A., &
3 VGT Schmidt, J.G.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
22173-0847 LDS 782 AB 2000 10 203 7.0 12.62 14.67 M4.5+M5 221718.96-084812.3
22173-0847 LDS 782 AB 2008 12 220 7.8 12.62 14.67 M4.5+M5 N 221718.96-084812.3
22173-0847 LDS 782 AB 2010 15 214 7.9 12.62 14.67 M4.5 M5 NV 221718.96-084812.3
22173-0847 LDS 782 AB 2012 16 214 8.0 12.62 14.67 M4V+M5V NV 221718.96-084812.3
22173-0847 LDS 782 AB 2015 19 215 7.9 12.62 14.67 M4V+M5V NV 221718.96-084812.3
22173-0847 LDS 782 AB 2016 20 216 7.9 12.62 14.67 M4V+M5V NV 221718.96-084812.3

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